Which of the following glassware is known for having a smaller tolerance?

Class A glassware is recognized for its high precision and lower tolerance levels compared to other types of glassware. This level of accuracy is critical in laboratory settings where precise measurements are crucial for experiments and analyses. The manufacturing process of Class A glassware ensures that it meets stringent standards, leading to a more consistent volume measurement, thereby reducing the potential for error in quantitative analyses.

In contrast, Class B glassware has a higher tolerance, meaning that its measurements may not be as precise, making it less suitable for applications where accuracy is critical. Standard glassware and plastic containers similarly do not match the accuracy and precision of Class A glassware, as they are designed for general use and may not adhere to the stringent manufacturing tolerances that Class A glassware does.

Thus, Class A glassware is the preferred choice in settings requiring stringent measurement standards, highlighted by its smaller tolerance.